How to fix computer - can't access windows

Kaboom !!!
I turn on my computer and I got this message on a black screen !!

Windows XP could not start because the following file is missing or corrupt: \WINDOWS\SYSTEM32\CONFIG\SYSTEM

*PANIC PANIC PANIC*
So I searched how to fix that
went to microsoft website, tried their suggestion, DIDN'T WORK
"How to recover from a corrupted registry that prevents Windows XP from starting"
http://support.microsoft.com/kb/307545

So I went here and it worked !!
Wehooooo !!! So happy !!!
Thank you nice people on the internet !!
http://www.icompute.info/System_restore_from_xp_cd.htm

so, briefly, here's what i did
You'd need your copy of Windows XP CD, insert
restart, press F8
choose boot from CD
choose R for Recovery
once you're at the Recovery console,
at c:\windows>
type: chkdsk /r (and enter)
after u're done,
type: cd / (and enter)
type another chkdsk /r if you want to
then type: cd system~1\_resto~1
type: dir
there will be lists of restore points folders, rp1, rp2, rp3, rp4 and so on, with dates
choose which date you want to restore back to
type: cd rp"x"
"x" is the corresponding number you choose, don't use the " " sign
type: cd snapshot

since my "system" file is corrupted,
type: copy _registry_machine_system c:\windows\system32\config\system
type: exit
my computer restarts and windows is back on
hoooyeaaaa

Go to the link, it's explained more detailed there !!!
http://www.icompute.info/System_restore_from_xp_cd.htm


remember :
note the space when you type !!!
and click enter after typing each command
your problem might be different from mine, but this one works for me :)
good luck

PS. I'm a genius ;)